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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd04b4b3736c51eff3859ad789d8666cb95b0b160523b7a790431e794ab4e844e' 
  AND token = 'Lhe37TGoCU/eGb2RUdL4N3tvQmILmFoXg9VtyatwrWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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