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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '188d8eda140496bacb4c8dcc01c17ee0f16231d2d022180fee42b50692990fa2' 
  AND token = 'q2b1Ac6am/rs2C4l3x9QghEPhxfdUTd6S7aUkwEJ7Fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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