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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ea9eaadd4163b626fd63bec0683442eb57ec880344a4c23237831441882abf1' 
  AND token = 'fD97f2x8rLSt2r8I3pNyu9BJjNYHGzFhpK6XTeW7fOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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