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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58ca2db19592bdf5d50cd656d90c3be593c2cfd029d2b1796b910b08cfe85b29' 
  AND token = 'NzxcZWxVkUpB7FFzWXJmSu4ck1nisxJ4QV4byp1j7xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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