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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0aacb3ded012d24670c33a0b0890bb1633b5aa2930e9fedfad98a21ee5ca67cd' 
  AND token = 'jmyDfFjq/DIlAoJt2N0gMnryEGe7/RpNtwojls3InxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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