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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a13307cb6399aa2023e6f0fa7cac395f092b0d8fe97925f6bad658fa1b626bf9' 
  AND token = 'vwOslIHio2NhQ11Jcz5Z8h0ff4d5yvaAH6GVZvGp8RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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