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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '932ea35eeee1204e9455abc9397e5570dad742cbd71b1c1b9f87ed8f0a2a562c' 
  AND token = 'THLeOO+QjeF2FdnfNGJFi4gSKVSSaMfNqlgOfTm2HTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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