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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8be750d2fb5a4d386cbc9dfaae42f1aa5f49b189e77f2ad34c7bad4d35a9202e' 
  AND token = 'vFZaGrLbwuv8wOFSqbUinwgtGOpDvo8kAZqCocBat5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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