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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd0cfbcb07da586733e85ac810961573e55a1d1145035ecbf19c4831115d767c' 
  AND token = '0UoMj6CroDkFhCO5K0djXWktZPaKnUPW5IA/c4tjwWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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