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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2c5a60c9ce2fecb3c359087c7c6f370bf577e7d32b1c57fd75060a2501e15ae' 
  AND token = 'sXBG3P2dv1n8BAAeilWmK/QwJAGpOr1wC3b/KnnFaWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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