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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b057e648744645eb9aba093de01189a577816e5e83257682ff9e98cff9f1880e' 
  AND token = 'V7wHkvJapfPZOU6YDAe1cZAeparbwEYY6WWKKa1N6MA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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