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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92cc8087a998112ec451bf753d2d4acf71e14f852b48fb5c4eec0c2c55ce7d76' 
  AND token = 'NkLlaaVBN/3bXA1+b0TDSx+XUTWPVfzR6+p5xywrd6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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