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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dafb4817eb636fe962119ba8f352123e0cc2309bedc4106512a062a798ccdeb9' 
  AND token = 'gA3vO2N2juLF4IKiDxxDhd9tbhlimk64kcCVafJWOj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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