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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072fc5231177a09c226b42da3273c1afb70cf08b95d74cbb3fd2237611d22b73' 
  AND token = 'PUbrpZ05dQxynPQdCCMDiHzelX8H7+N+kcS4wKS4HJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}