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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0118074efa9ea4c8ca42c544810294f7b4c1b29eead1d662ac6e8f4a8b49da86' 
  AND token = 'csgLSKvVSA1Oybv9sxrMzzEOJ3TeKH1QkjpwJJoBdT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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