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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2ee838a481d66538def91c6a26f4a67e190fd30033e2bd852266c54f8aac044' 
  AND token = '+hmKWtTpNMDP/ZsMvsDxVV7gcK1ltldDvCk/n0CbNX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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