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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2265e90f6b9e58a715f8c2c1931f07d121cff0f5e1c5787ea432a8081c95e0a' 
  AND token = '77zrzLJm79hia/mSH0eOmUWCS1kSP+7Y3O7wUHY8TIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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