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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '674152ae825fa409489c9c2fa01adccd2c319d22733f7e096a02b2e2b3183a1f' 
  AND token = 'XKOV6Re2oHoIsA+Ria6egTJrKggtiJJ94FH2F8FWTIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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